My problem is:
In (4 example) A1 I have time which is updated.
I need to change value in (4 example) A2 depending on time.
But, every new updated minut I need to have value in A2 updated by (again 4
example) 1.

So, I need:

A
1 18:52
2 66

---------------

A
1 18:53
2 67


Another problem will be to change the value (that +1) in another value (+2).

Sorry 4 bad typing.

Thx. in advance.